Railroad car truck bolster suspension



Feb. 8, 1949. G. T. R. HUNTER 2,461,382

I` v RAILROAD *CAR TRUCK BOLSTER SUSPENSION 4 Filed Dec. 23, .1947

` 46 Y Inventar George 72 R. Hunter 50 l m 42 By Patented Feb. 8, 1949 UN l T ED STAT ES r omer:

RAILROAD CAR TR'UCKBOLSTER SUSPENSION George T. R.. Hunter, St. Louis, Mo.

Application 'December 23, 11947, Serial No. 793,538

(Cl. E-197:)

cludin-g novel and improved means 'for :reducing the upward thrust of a truck'sideirame to Drevent derailing of a railroad car.

Another important object df the present invention is to provide a railroad car truck side Vframe including novel and improved -mearrs for guiding the upward and downward movement of a railroad car bolster.

A further object of the present invention is to provide a spring mounted bolster support plate including novel and improved spring seats for engaging the ends of a plurality of springs to prevent disengagement of the springs relative therefrom.

A still further aim of the present invention is to provide a railroad car truck side frame that is simple and practical in construction, strong and reliable in use, small and compact in structure, relatively inexpensive to manufacture, and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view of a railroad car truck side frame constructed in accordance with the present invention;

Figure 2 is a fragmentary top plan view of the present railroad car tru'ck side frame and showing the car axles and bolster broken away and shown in section;

Figure 3 is a longitudinal horizontal sectional view taken substantially on the piane of section line 3-3 of Figure 1; and! Figure 4 is a transverse vertical sectional view taken substantially on the plane of section line 4 4 of Figure 1.

Referring now to the drawings in detail, wherein for the purpose of illustration, there is disclosed a preferred embodiment of the present invention, the numeral I0 represents the present railroad 'car truck side frame generally, comprising an upper cord or member I2 that is supported on the journal boxes I4 of a pair of railroad car axles I'B in the usual manner. Integrally formed with the ends I8 of the upper cord I 2 are the upper ends of a pair of outwardly and upwardly inclined side'arms 22ofa lower cord or :member Rigidly secured to the inner faces ofthe members I2 Yand r24, is a'pair of spaced parallel, vertical, inner bolster guide bars or ribsl 26 rwhich oppose 'a pair of rigid, spaced parallel, vertical outer bolster guide bars or ribs 23 that are fixed to the outer faces of the members I2 and 24;

Slidably mounted for upward and downward movement between the members i2 and 24, isa

substantially rectangular support plate 3B having an enlarged substantiallysquare central portion 32 that supportsthe railroad car bolster 34.'

Fixed to the opposed faces of the portion 30 and the member 24, are spring supporting plates 36 having va, plurality of spaced, annular and concaved seats 38 that frictionally engage the end portions of a plurality of main coil springs 4!) to resiliently restrict the downward movement of the bolster 34.

Also fixed to the opposing faces of the support plate 30 andthe members i2 and 2li, are further groups of spring supporting plates 42 having an` nular concaved recesses d that fricticnally engage the ends-of upper coil springs 46 and 48 and lower coil springs 50 and 52 disposed on opposite sides of the bolster 34 as shown best in Figure 1 of the drawings.

In practical use of the device, the springs 46 and 4B will restrict and cushion the upward movement of the support plate St and the springs 50, 52 and 4I) will restrict and cushion the downward movement 'of the 'plate 30 resulting from movement of the bolster as the train car moves on its tracks.

The said upper springs de and 48 cooperate with the springs 40, 59 and 52 to restrict tipping movement of the support plate 39.

In view of the foregoing description taken in conjunction with the accompanying drawings it is believed that a clear understanding of the construction, operation and advantages of the device will be quite apparent to those Vskilled in this art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. In a railroad car truck side frame including spaced parallel substantially vertical inner guide bars fixed to the inner faces of said members, and a further pair of spaced parallel substantially vertical outer guide bars fixed to the outer faces of said members; a bolster support cornprising, a bolster supporting member slidably mounted between all of said guide bars, resilient means disposed between the lower member and the bolster supporting member forl cushioning the downward movement of said bolster supporting member, integral extensions projecting fromV said bolster supporting member, further resilient means positioned between the extensions and the lower member for cushioning the downward sliding movement of said bolster supporting member, and still further resilient means disposed between the extensions and said upper member for cushioning the upward sliding movement of said bolster supporting member, saidguide bars limiting certain relative movement of said -bolster supporting member and a bolster supported thereon, said further resilient means and said still further resilient means vcooperatingr to restrict tipping of said bolster supporting member.

2. A railroad car truck side frame comprising an upper member and a lower member having joined forward ends and rear-ends, a pair of spaced parallel substantially vertical inner guide bars iixed to the inner faces of said members Yadjacent the joined ends thereof, a further pair of spaced parallel substantiallyA vertical outer guide bars fixed to the outer faces of said memand said lower member for cushioning the downward movement of said bolster supporting member, further resilient means disposed between said extensions and said lower member coacting with said first-mentioned resilient means to cushion the downward movement of said bolster supportingv member, and still further resilient means disposed between said extensions and said upper member for cushioning the upward movement of said bolster supporting member.

n GEORGE T. R. HUNTER.

REFERENCES CITED The following references are of record in the le of this patent:A

UNITED YSTATES PATENTS Number Name Date 1,757,936 McCullough May 6, 193i) 1,976,937 Haseltine Oct. 16, 1934 2,256,863

Perkins Sept. 23, 194i 

